Mema, Canasa doesn’t work quickly, so it only makes sense to try if you bring patience to the process. How long did you give it last time? If the cost prevents you from giving it sufficient time, or continuing it if it works, then there are less expensive ways to use 5-ASA. Mesalamine enemas are usually cheaper than canasa, and oral sulfasalazine is cheaper still. The list of meds you have leftover supplies of is growing in this thread, so it sounds like you may have a complicated history with your doctor(s). Is it possible that you are abandoning some treatment possibilities prematurely?